Finding the Fourth Proportional to 290,986.83, 436,498.70 and 91,315.09
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Solution
The fourth proportional to 290,986.83, 436,498.70 and 91,315.09 is: 136,978.43
Step by Step Solution
- Step 1: Write the proportion equation
290,986.83 : 436,498.70 = 91,315.09 : x - Step 2: Convert to fraction form
290,986.83/436,498.70 = 91,315.09/x - Step 3: Cross multiply
290,986.83x = 436,498.70 × 91,315.09 - Step 4: Simplify right side
290,986.83x = 39,858,918,075.38 - Step 5: Solve for x
x = 39,858,918,075.38/290,986.83 - Step 6: Final answer
x = 136,978.43
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.